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  <a name="ZH-CN_TOPIC_0000001792388580"></a><a name="ZH-CN_TOPIC_0000001792388580"></a>
  <h1 class="topictitle1">步骤5：创建备份SLA</h1>
  <div id="body0000001126992683">
   <p id="ZH-CN_TOPIC_0000001792388580__p11969354193413">您可以根据自身需求自定义SLA以对资源进行保护。</p>
   <div class="section" id="ZH-CN_TOPIC_0000001792388580__section12911161293011">
    <h4 class="sectiontitle">操作步骤</h4>
    <ol id="ZH-CN_TOPIC_0000001792388580__ol11230173816309">
     <li id="ZH-CN_TOPIC_0000001792388580__li17347131514191"><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839142377_uicontrol8111821122820">“<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839142377_text71111921162814">保护</span> &gt; 保护策略 &gt; SLA”</span>。</span></li>
     <li id="ZH-CN_TOPIC_0000001792388580__li48063018197"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001656561497_uicontrol12389192016473">“<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001656561497_text1214017349462">创建</span>”</span>。</span></li>
     <li id="ZH-CN_TOPIC_0000001792388580__li12855554181920"><span>自定义SLA的名称。</span></li>
     <li id="ZH-CN_TOPIC_0000001792388580__li5742367205"><span>选择需要创建SLA的应用类型。</span><p></p>
      <ol type="a" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_ol71011061385">
       <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_li874192611325">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_uicontrol16364345183319">“<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_text1149753619468">应用</span>”</span>图标，选择要创建SLA的应用。
        <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_ul157501053341">
         <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_li3750135143412"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_text10801323154310">通用SLA</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_p144377559348">通用SLA可以应用到除文件集、SQL Server、PostgreSQL、Kingbase、Redis、ClickHouse、MongoDB、NAS共享、NAS文件系统、华为云Stack GaussDB、TDSQL、Kubernetes CSI、TiDB、卷、通用共享、GaussDB T 单机、对象存储以外的资源。</p></li>
         <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_li1512516103413"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_text1431211194314">指定应用</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_p1889316245358">选择需要创建SLA的一种应用类型，本节以创建<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_text52802054182812">指定应用</span>为例进行说明。</p></li>
        </ul></li>
       <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_li7586156123316">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001264095230_uicontrol206968467360">“确定”</span>。</li>
      </ol> <p></p></li>
     <li id="ZH-CN_TOPIC_0000001792388580__li148724933815"><span>配置备份策略。</span><p></p>
      <ol type="a" id="ZH-CN_TOPIC_0000001792388580__ol187761825123814">
       <li id="ZH-CN_TOPIC_0000001792388580__li35291622193815">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__uicontrol2056715110393">“<span id="ZH-CN_TOPIC_0000001792388580__text106341752134712">备份策略</span>”</span>图标。</li>
       <li id="ZH-CN_TOPIC_0000001792388580__li1244710220390">配置备份策略基础参数。<p id="ZH-CN_TOPIC_0000001792388580__p1990565714431"><a name="ZH-CN_TOPIC_0000001792388580__li1244710220390"></a><a name="li1244710220390"></a>相关参数说明如<a href="#ZH-CN_TOPIC_0000001792388580__table2663151516335">表1</a>所示。</p>
        <div class="p" id="ZH-CN_TOPIC_0000001792388580__p18725921144820">
         请根据业务情况合理设置备份频率、副本保留时长和备份时间窗口，建议如下：
         <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_ul188491594283">
          <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li14385102192911">备份频率至少大于备份时长。</li>
          <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li19397172762917">全量副本的保留时长大于增量备份（或永久增量（合成全量）备份）副本的保留时长。</li>
          <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li2084975982817">副本保留时长必须大于备份频率。</li>
         </ul>
         <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_note71621858195515">
          <img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span>
          <div class="notebody">
           <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_ul192116591633">
            <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li921115591430">至少需要创建一个备份策略，如需添加其他备份策略，请单击界面右侧的<span><img id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_image178791955235" src="zh-cn_image_0000001939082533.png"></span>。</li>
            <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li621119590319">每种备份类型最多支持添加4个备份策略。</li>
           </ul>
          </div>
         </div>
        </div>
        <div class="tablenoborder">
         <a name="ZH-CN_TOPIC_0000001792388580__table2663151516335"></a><a name="table2663151516335"></a>
         <table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001792388580__table2663151516335" frame="border" border="1" rules="all">
          <caption>
           <b>表1 </b>备份策略基础参数说明
          </caption>
          <colgroup>
           <col style="width:11.899999999999999%">
           <col style="width:15.22%">
           <col style="width:72.88%">
          </colgroup>
          <thead align="left">
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001387748585_zh-cn_topic_0000001142022930_row666215155334">
            <th align="left" class="cellrowborder" colspan="2" valign="top" id="mcps1.3.2.2.5.2.1.2.3.2.4.1.1"><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001387748585_zh-cn_topic_0000001142022930_p4662171516333">参数</p></th>
            <th align="left" class="cellrowborder" valign="top" id="mcps1.3.2.2.5.2.1.2.3.2.4.1.2"><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001387748585_zh-cn_topic_0000001142022930_p166621215123312">说明</p></th>
           </tr>
          </thead>
          <tbody>
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_row1474014569323">
            <td class="cellrowborder" rowspan="2" valign="top" width="11.899999999999999%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001142022930_p14662115153320"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001142022930_text189091138183019">全量备份</span></p></td>
            <td class="cellrowborder" valign="top" width="15.22%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p10862922113217"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_text1451193120338">名称</span></p></td>
            <td class="cellrowborder" valign="top" width="72.88%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p486272220321">设置备份策略名称。</p></td>
           </tr>
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001387748585_zh-cn_topic_0000001142022930_row117822001416">
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001142022930_p846494481616">-</p></td>
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 ">
             <div class="p" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001142022930_p1432741045617">
              配置全量备份的执行时间、备份频率、副本保留时长以及备份时间窗口。
              <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_ul06281446133611">
               <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li5628184619364">配置全量备份的备份频率以及副本的保留时长。
                <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_ul3912541183319">
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li1491311419338"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text881714512382">按年</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p7913141173316">设置每年xx月xx日执行一次，副本保留xx天/周/月/年或永久保留。</p> <p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p52204181864">如果当年不存在该日期，则不产生副本。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li18913134153311"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text9120524389">按月</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p19131141133318">设置每月xx日（可选择多日）或最后一天执行一次，副本保留xx天/周/月/年或永久保留。</p> <p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p131866516465">如果设置为每月xx日执行一次备份，当月不存在该日期时，则不产生副本。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li79137410332"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text107501579380">按周</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p091313410338">设置每周一/二/三/四/五/六/日执行一次（可多选），副本保留xx天/周/月/年或永久保留。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li18498191724615"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text199032391683">按天</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p46219385469">设置从xx年xx月xx日开始，每xx天执行一次备份，副本保留xx天/周/月/年或永久保留。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li426962116468"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text14231841203315">按小时</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p6350614134914">设置从xx年xx月xx日开始，每xx小时执行一次备份，副本保留xx天/周/月/年或永久保留。</p></li>
                </ul></li>
               <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li1881682412376">设置允许执行全量备份的时间段，该时间范围以外的时间不会进行全量备份任务调度。
                <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_note3335182113214">
                 <span class="notetitle"> 说明： </span>
                 <div class="notebody">
                  <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_ul64461851101420">
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li037445621410">如果结束时间小于或等于开始时间，则结束时间实际为跨日的结束时间。</li>
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li4446145117142">如果备份任务在指定的时间窗口内未执行完成，系统不会中止本次备份任务，但会上报事件。</li>
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li4684315367">一旦副本超过设定的保留时长，系统将自动删除过期的副本。</li>
                  </ul>
                 </div>
                </div></li>
              </ul>
             </div></td>
           </tr>
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_row13725521123317">
            <td class="cellrowborder" rowspan="3" valign="top" width="11.899999999999999%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p166621152333"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_text621714495307">增量备份</span></p></td>
            <td class="cellrowborder" valign="top" width="15.22%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p61951030143316"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_text1319503023318">名称</span></p></td>
            <td class="cellrowborder" valign="top" width="72.88%" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p4195930113318">设置备份策略名称。</p></td>
           </tr>
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_row1186718120463">
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p58685126461">备份</p></td>
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p14868212184619">勾选“<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_text168541715201">设置为永久增量（合成全量）备份</span>”，可将增量备份策略设置为<span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_text1852075895818">永久增量（合成全量）备份</span>策略。</p></td>
           </tr>
           <tr id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_row138678109916">
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p956861916235">-</p></td>
            <td class="cellrowborder" valign="top" headers="mcps1.3.2.2.5.2.1.2.3.2.4.1.1 ">
             <div class="p" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_p3847158134612">
              配置增量备份的首次执行时间、备份频率、副本保留时长以及备份时间窗口。
              <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_ul167919791414">
               <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li1079119781413">配置增量备份的备份频率以及副本的保留时长。
                <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_ul1679113751412">
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li177910751413"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text9791187121410">按年</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p7791117131413">设置每年xx月xx日执行一次，副本保留xx天/周/月/年或永久保留。</p> <p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p62586191379">如果当年不存在该日期，则不产生副本。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li1279112715144"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text979110717147">按月</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p179113721413">设置每月xx日（可选择多日）或最后一天执行一次，副本保留xx天/周/月/年或永久保留。</p> <p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p125877114419">如果设置为每月xx日执行一次备份，当月不存在该日期时，则不产生副本。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li879112716144"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text27913720144">按周</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p1079111741416">设置每周一/二/三/四/五/六/日执行一次（可多选），副本保留xx天/周/月/年或永久保留。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li251355615915"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text0935195916812">按天</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p175137561491">设置从xx年xx月xx日开始，每xx天执行一次备份，副本保留xx天/周/月/年或永久保留。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li17513125616918"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text11653155316339">按小时</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p451312561795">设置从xx年xx月xx日开始，每xx小时执行一次备份，副本保留xx天/周/月/年或永久保留。</p></li>
                 <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li108498361016"><span id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_text4119140183416">按分钟</span><p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_p178491339103">设置从xx年xx月xx日开始，每xx分钟执行一次备份，副本保留xx天/周/月/年或永久保留。</p></li>
                </ul></li>
               <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_li1679107171411">设置允许执行增量备份的时间段，该时间范围以外的时间不会进行增量备份任务调度。
                <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_note77917711419">
                 <span class="notetitle"> 说明： </span>
                 <div class="notebody">
                  <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_zh-cn_topic_0000001839143189_ul64461851101420">
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_zh-cn_topic_0000001839143189_li037445621410">如果结束时间小于或等于开始时间，则结束时间实际为跨日的结束时间。</li>
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_zh-cn_topic_0000001839143189_li4446145117142">如果备份任务在指定的时间窗口内未执行完成，系统不会中止本次备份任务，但会上报事件。</li>
                   <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839159805_zh-cn_topic_0000001839143189_zh-cn_topic_0000001839143189_li4684315367">一旦副本超过设定的保留时长，系统将自动删除过期的副本。</li>
                  </ul>
                 </div>
                </div></li>
              </ul>
             </div></td>
           </tr>
          </tbody>
         </table>
        </div></li>
       <li id="ZH-CN_TOPIC_0000001792388580__li1464801164113">配置备份策略高级参数。
        <div class="p" id="ZH-CN_TOPIC_0000001792388580__p7946203592">
         <a name="ZH-CN_TOPIC_0000001792388580__li1464801164113"></a><a name="li1464801164113"></a>相关参数说明如<a href="#ZH-CN_TOPIC_0000001792388580__table208961159155817">表2</a>所示。 
         <div class="tablenoborder">
          <a name="ZH-CN_TOPIC_0000001792388580__table208961159155817"></a><a name="table208961159155817"></a>
          <table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001792388580__table208961159155817" frame="border" border="1" rules="all">
           <caption>
            <b>表2 </b>备份策略高级参数说明
           </caption>
           <colgroup>
            <col style="width:30.04%">
            <col style="width:69.96%">
           </colgroup>
           <thead align="left">
            <tr id="ZH-CN_TOPIC_0000001792388580__row198941159175819">
             <th align="left" class="cellrowborder" valign="top" width="30.04%" id="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1"><p id="ZH-CN_TOPIC_0000001792388580__p089425925812">参数</p></th>
             <th align="left" class="cellrowborder" valign="top" width="69.96%" id="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2"><p id="ZH-CN_TOPIC_0000001792388580__p19894165945810">说明</p></th>
            </tr>
           </thead>
           <tbody>
            <tr id="ZH-CN_TOPIC_0000001792388580__row10368102514142">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p24732444489">指定目标位置</p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 ">
              <div class="p" id="ZH-CN_TOPIC_0000001792388580__p1473184413481">
               如果您部署了集群高可用特性，请指定备份副本的目标存储位置。<span style="color:#282B33;">如不指定，则系统通过智能均衡自动选择备份目标存储单元。</span>
               <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_ul3832679403">
                <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li178323718400">备份存储单元：对应于备份集群节点。选择备份存储单元后，副本将存储至该存储单元。存储单元容量不足时，备份任务将会失败。</li>
                <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li31700914016">备份存储单元组：是备份存储单元的集合。选择备份存储单元组后，系统根据存储单元组的存储策略自动选择备份目标存储单元。</li>
               </ul>
              </div></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row3895959145817">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p10894195925818"><span id="ZH-CN_TOPIC_0000001792388580__text115351321132020">限速策略</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p1930417163715">备份任务平均每秒最大传输的数据量。</p> <p id="ZH-CN_TOPIC_0000001792388580__p208941559135816">选择<a href="zh-cn_topic_0000001839267645.html">已创建的限速策略</a>。</p></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row67412341911">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p9741933192"><span id="ZH-CN_TOPIC_0000001792388580__text15921530164515">自动索引</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p57418310194"><span style="color:#282B33;">开启后，系统自动为副本创建文件索引，创建索引后，支持搜索副本中的文件、目录或链接。</span><span style="color:#282B33;">您也可以为副本手动创建索引。</span></p></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row177419319192">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p147416311194"><span id="ZH-CN_TOPIC_0000001792388580__text9672155024520">目标端重删</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p157415314191">当平均文件大小&gt;=32KB 时，建议开启此开关，节省备份存储空间。</p></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row79221213162111">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p0247122472114"><span id="ZH-CN_TOPIC_0000001792388580__text15247824162119">源端重删</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 ">
              <div class="p" id="ZH-CN_TOPIC_0000001792388580__p1924772416211">
               开启后，可以减少传输的数据量，但会增加客户端的资源占用。
               <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_note8885112682911">
                <span class="notetitle"> 说明： </span>
                <div class="notebody">
                 <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_ul5885426132914">
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li10885172616299">由于同一个代理主机只能和一个存储单元建链，如果开启源端重删，<span class="parmname" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_parmname1288482662917">“指定目标位置”</span>请选择<span class="parmvalue" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_parmvalue118843260299">“备份存储单元”</span>。否则，由于智能均衡可能会选择到未建链的存储单元，导致源端重删启用失败。如果不同受保护对象关联了不同SLA，且SLA中指定不同的备份存储单元，请为受保护对象选择不同代理主机，否则将会导致部分备份任务源端重删启用失败。</li>
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li9885182662911">如果代理主机已经与一个存储单元建链，当该代理主机未执行源端重删备份任务时，可以在代理主机上执行<strong id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_b9845163710167">dataturbo delete storage_object storage_name=</strong><em id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_i19447038131614">?</em>命令（命令中的<strong id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_b1050314315162">storage_name=</strong><em id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_i1237554410161">?</em>可以通过<strong id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_b11885726112912">dataturbo show storage_object</strong>命令查询），删除与存储单元的源端重删链接。再选择该代理主机执行源端重删备份任务，则可以成功与新的存储单元建链。</li>
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li11885142615297">请参考<a href="https://info.support.huawei.com/storage/comp/#/oceanprotect" target="_blank" rel="noopener noreferrer">兼容性查询工具</a>查看主机的操作系统类型是否支持源端重删，若不支持，配置源端重删后将不会生效。</li>
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li7883549153219">若使用内置代理进行备份，配置源端重删后将不会生效。</li>
                 </ul>
                </div>
               </div>
              </div></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row86891244112116">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 ">
              <div class="p" id="ZH-CN_TOPIC_0000001792388580__p1424165692110">
               任务超过时间窗告警
               <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_note379352823112">
                <span class="notetitle"> 说明： </span>
                <div class="notebody">
                 <p id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_zh-cn_topic_0000001839143213_p8320153562113">仅1.6.0及后续版本支持设置该参数。</p>
                </div>
               </div>
              </div></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p14242056162113">开启后任务执行超过时间窗将发送告警，告警需手动清除。</p></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row97417361910">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p177453161912"><span id="ZH-CN_TOPIC_0000001792388580__text7896312154615">任务失败告警</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p97416381910"><span style="color:#282B33;">开启后，在任务失败后发送告警，下一次任务成功后告警自动清除。</span></p></td>
            </tr>
            <tr id="ZH-CN_TOPIC_0000001792388580__row18951659135816">
             <td class="cellrowborder" valign="top" width="30.04%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792388580__p1789545935810"><span id="ZH-CN_TOPIC_0000001792388580__text104199407596">失败后自动重试</span></p></td>
             <td class="cellrowborder" valign="top" width="69.96%" headers="mcps1.3.2.2.5.2.1.3.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792388580__p8438175510377">开启后，备份任务失败后系统自动重试。</p>
              <div class="p" id="ZH-CN_TOPIC_0000001792388580__p6686112353917">
               支持重试次数为1~5次，等待时长为1~30分钟。如设置为重试3次，等待5分钟，即每5分钟后重试一次，总共重试3次。
               <div class="note" id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_note139701345152818">
                <span class="notetitle"> 说明： </span>
                <div class="notebody">
                 <ul id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_ul264071314279">
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li1864001332715">自动重试时系统会创建一个新的备份任务，如果该备份任务不在设定的时间窗内则不会执行，此次备份失败。</li>
                  <li id="ZH-CN_TOPIC_0000001792388580__zh-cn_topic_0000001839143189_li116401113172713">该功能仅在周期性备份时生效。手动发起备份任务，任务失败无法自动重试。</li>
                 </ul>
                </div>
               </div>
              </div></td>
            </tr>
           </tbody>
          </table>
         </div>
        </div></li>
       <li id="ZH-CN_TOPIC_0000001792388580__li57592419395">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__uicontrol12794828131415">“<span id="ZH-CN_TOPIC_0000001792388580__text137561001515">确定</span>”</span>。</li>
      </ol> <p></p></li>
     <li id="ZH-CN_TOPIC_0000001792388580__li1618195321716"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001792388580__uicontrol65831059121713">“<span id="ZH-CN_TOPIC_0000001792388580__text162541112165110">确定</span>”</span>。</span></li>
    </ol>
   </div>
  </div>
  <div>
   <div class="familylinks">
    <div class="parentlink">
     <strong>父主题：</strong> <a href="zh-cn_topic_0000001792388596.html">备份文件集</a>
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